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    On the generation and evolution of internal solitary waves in the southern Red Sea

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    Type
    Presentation
    Authors
    Guo, Daquan cc
    Zhan, Peng cc
    Kartadikaria, Aditya R. cc
    Akylas, Triantaphyllos
    Hoteit, Ibrahim cc
    KAUST Department
    Beacon Development Company
    Earth Fluid Modeling and Prediction Group
    Earth Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2015-04
    Permanent link to this record
    http://hdl.handle.net/10754/595106
    
    Metadata
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    Abstract
    Satellite observations recently revealed the existence of trains of internal solitary waves in the southern Red Sea between 16.0°N and 16.5°N, propagating from the centre of the domain toward the continental shelf [Da silva et al., 2012]. Given the relatively weak tidal velocity in this area and their generation in the central of the domain, Da Silva suggested three possible mechanisms behind the generation of the waves, namely Resonance and disintegration of interfacial tides, Generation of interfacial tides by impinging, remotely generated internal tidal beams and for geometrically focused and amplified internal tidal beams. Tide analysis based on tide stations data and barotropic tide model in the Red Sea shows that tide is indeed very weak in the centre part of the Red Sea, but it is relatively strong in the northern and southern parts (reaching up to 66 cm/s). Together with extreme steep slopes along the deep trench, it provides favourable conditions for the generation of internal solitary in the southern Red Sea. To investigate the generation mechanisms and study the evolution of the internal waves in the off-shelf region of the southern Red Sea we have implemented a 2-D, high-resolution and non-hydrostatic configuration of the MIT general circulation model (MITgcm). Our simulations reproduce well that the generation process of the internal solitary waves. Analysis of the model's output suggests that the interaction between the topography and tidal flow with the nonlinear effect is the main mechanism behind the generation of the internal solitary waves. Sensitivity experiments suggest that neither tidal beam nor the resonance effect of the topography is important factor in this process.
    Conference/Event name
    EGU General Assembly 2015
    Additional Links
    http://adsabs.harvard.edu/abs/2015EGUGA..17.4499G
    Collections
    Physical Science and Engineering (PSE) Division; Earth Science and Engineering Program; Presentations

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